Bar stool



FIG. 1 is a front and top perspective view of a bar stool, showing mynew design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof; and,

FIG. 6 is an enlarged top plan view thereof.

CLAIM The ornamental design for a bar stool, as shown and described.